On the applicability of cluster models to study the chemical reactivity of carbon nanotubes

Dublin Core

Title

On the applicability of cluster models to study the chemical reactivity of carbon nanotubes

Subject

NANOTECNOLOGIA
NANOTUBOS DE CARBONO
BIBLIOGRAFIA NACIONAL QUIMICA
2011

Abstract

We have performed a comparative study on the reactivity of metallic and semiconducting nanotubes using infinite and finite models. Infinite models were created using periodic boundary conditions while finite ones were constructed by means of hydrogen terminated nanotubes sections. Cluster models systematically underestimate the reactivity of metallic single wall carbon nanotube (SWCNT)s. We have confirmed that metallic nanotubes are more reactive than semiconducting species, in disagreement with previous works. The differences can be attributed to the presence of an instability in the singlet ground state of the wavefunction corresponding to semiconducting nanotubes clusters. When lower electronic states of the pristine cluster are considered, semiconducting nanotubes become less reactive as compared with metallic SWCNTs. Particularly, if an antiferromagnetic solution is considered for the semiconducting (10,0) SWCNT cluster, it becomes less reactive than the (5,5) SWCNT, as observed for infinite models. Because semiconducting nanotubes are less reactive than metallic counterparts, their reaction energies converge faster to the values observed for graphene. For a 1.6-nm diameter semiconducting nanotube, the addition energy is comparable with graphene. Thus, semiconducting nanotubes with diameters larger than 1.6 nm are going to be as reactive as graphene and the effects of curvature will be unimportant.

Source

Journal of Computational Chemistry v. 32, no. 11, 2011. -- p. 2397-2403

Publisher

Wiley

Date

2011

Rights

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Format

PDF

Language

Inglés

Type

Artículo

Identifier

ISSN: 1096-987X Online
Date Added
August 19, 2013
Collection
Bibliografía Nacional Química
Item Type
Document
Tags
,
Citation
Denis, Pablo A. and Iribarne Restuccia, Federico Pablo, “On the applicability of cluster models to study the chemical reactivity of carbon nanotubes,” RIQUIM - Repositorio Institucional de la Facultad de Química - UdelaR, accessed December 15, 2025, https://riquim.fq.edu.uy/items/show/763.